From aa1592ae2be143e1d14682e189637541eac7d9b1 Mon Sep 17 00:00:00 2001
From: Daniel Krebs <github@daniel-krebs.net>
Date: Mon, 26 Mar 2018 15:41:40 +0200
Subject: [PATCH] utils: read_random() now returns the number of bytes written

---
 fpga/include/villas/utils.h | 2 +-
 fpga/lib/utils.c            | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/fpga/include/villas/utils.h b/fpga/include/villas/utils.h
index 272afd6eb..828796fb6 100644
--- a/fpga/include/villas/utils.h
+++ b/fpga/include/villas/utils.h
@@ -240,7 +240,7 @@ int version_parse(const char *s, struct version *v);
 #endif
 
 /** Fill buffer with random data */
-ssize_t read_random(char *buf, size_t len);
+size_t read_random(char *buf, size_t len);
 
 /** Get CPU timestep counter */
 __attribute__((always_inline)) static inline uint64_t rdtsc()
diff --git a/fpga/lib/utils.c b/fpga/lib/utils.c
index 2e295191d..10fc8348f 100644
--- a/fpga/lib/utils.c
+++ b/fpga/lib/utils.c
@@ -260,14 +260,14 @@ void * memdup(const void *src, size_t bytes)
 	return dst;
 }
 
-ssize_t read_random(char *buf, size_t len)
+size_t read_random(char *buf, size_t len)
 {
 	int fd;
 	ssize_t bytes, total;
 
 	fd = open("/dev/urandom", O_RDONLY);
 	if (fd < 0)
-		return -1;
+		return 0;
 
 	bytes = 0;
 	total = 0;